Fixed: Restore SPC7110 and S-RTC time properly

Loading and unloading the RTC makes little sense, since it's non-
volatile in the first place. Apparently, an interface refactoring
after v098 reordered the load calls, and this (along with a typo,
shh!) was causing the already loaded time to be cleared.
I've added checks so that whenever rtc.ram can't be found, load() gets
called with empty arguments to initialise the defaults (like putting
in a fresh battery).